Sectional smoke flue



y.lul-y 28, 1931. 1. A. WATCH'ER SECTIONAL SMOKE FLUE Filed Mar-ch l1, 1930 ff i v ulm ByMw/h Affomeyf.

Patented July 28,` 1931 UNITED STATES JOHN A. WATCHER, onmgoxson', taurinasentia-y a j,

SECTIONAL slvion Finn Y Application flied March 11, 1930,?fjsgeiarno.'$34,975.

This invention vrelates to certain improve- Vments and refinements embodiedy in a sectional knock-down smoke flue or pipe such as is used in association with furnaces, boil- (B1 ers, hot water heaters, chimney extensions,

and the like.

In carrying the invention into practice, Iv have developed a smoke pipe which is char` y l following description and drawings.

In the drawings: f f i j Figure 1 is a sectional view of a fragmentary portion of a smoke pipe constructed in accordance with the present invention.

Figure 2 is a fragmentary side elevational view thereof.

Figure 3 isa horizontal section.

Figure 4 is a .view similar to Figure 3 showing a corrugated dial of pipe length.

Referring now to the drawings by reference numerals, it will be seen in Figure 2 that I have shown a pair of pipe lengths 5 and 6 respectively which may be of suitable cross sectional shape and reither corrugated as shown in Figure 4, or of flattened formation as seen in Figure 3. Each pipe length is composed of companionate half sections 7 and 8 whose longitudinal edges are disposed in overlapping and appropriately connected relationship to define a smoke-proof joint.

For example as seen in Figure 3,.the joint may be of the single flange type as repre-V sented at 9 or may be of the form shown at 10 which includes a channel 11 on one section and an offset flange or lip 12 on the other section fitting into the channel.

The numeral 13 designates guides and retention projections which serve to hold in place aclamping ring or band 14 whose free ends are fastened together by a bolt as shown at 15 in Figure 2. This clamping band is for holding the half sections 7 and 8 in assembled relationship and it allows for expansion and contraction and adjustment.

The upper'end `of the female section or pipe length 5 is formed with an outwardly offset annulus defining a circular rim as at 16 which receives the adjacent end of the male length 6. The shoulder defined by the offset rim cous5 operates with the lugs 17 in holding the upper clamping band 18 in place. The lugs 17 cooperate with similar lugs 19 to accommodate the connecting and retaining bolts 20.

There are two kinds, one thesplit section on flue and the other the solid section flue. Said flues can be made up in various lengths, varying from one foot to three feet, the diameter being from eight inches to 24 inches, the j idea being that the flues can be joined together to `make-the length of stackr desired.

The pipes arey corrugated in order to take care of expansion and contraction. j

The lugs, with bolts running through vertically, are for the purpose of holding joints 219 together tightly whenr lowering the flue in long pieces. The bands running around said flue are for the purpose of holding the same together firmly. Lugs to be used on ends of bands and for drawing the same together are '15 so constructed as to take care of expansion and contraction ofthe flue, due to change of temperature. Joints are all to be filled with furnace cement when assembled for installa tion.

It is thought that persons skilled in the art to which the invention relates .will be able to vobtain a clear understanding of the invention after considering the description in connection with the drawings. Therefore, a more e185 lengthy description is regarded as unnecessary. Minor changes in shape, size, and rearrangement of details coming'within the field of invention claimed may be resorted to in 9.0 actual practice if desired.

I claim:

In a smoke-stack construction of the class described, a male pipe section comprising a pair of separable half sections having theirhl longitudinal edges joined together in overlapping relationship, a pair of diametrically opposite apertured lugs carried by said male section, a female section composed of a pair of half sections also having their meetingalOO y edges oined together in overlapping relationship7 the upper end of the female section being formed with an offset annular rim telescoplcally receiving the adjacent companion end of the first-named section, said female Section being provided at a point below said rim with outstanding tpertured lugs, a split clamping band surrounding said female section and resting on the second named lugs and 10 confined beneath the shoulder dened by said rim, and connecting bolts passing through the apertures in the co-related lugs of the respective sections.

In testimony whereof I aix my signature. JOHN A. WATCHER. 

